Reversing-valve for engines.



No. 744,062. PATENTED Nov. 17, 1 903.

R. s. FUBMA'N.

JREVERSING VALVE FOR ENGINES.

APPLICATION FILED sEP r. 1. 1903. N0 MODEL.

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REVERSING- VALVE FOR ENGINES.

SPECIFICATION forming part of Letters Patent N 0. 744,062, dated November 17, 1903.

Application filed September 1, 1903. Serial No. 171,546. (No model.)

To aZZ whom it may concern: I

Be it known that I, RICHARD S. FURMAN, a citizen of the United States, residing at Chattano0ga, in the county of Hamilton and State of Tennessee, have invented new and useful Improvements in Reversing-Valves for Eugines, of which the following is a specification.

The object of my invention is the production of an improved reversible fluid-pressure engine which shall be simple in construction, durable, not liable to become deranged, and which shall constitute a superior means for performing the requisite functions.

With this end in view my invention consists in certain novelties of construction and combinations of parts, hereinafter set forth and claimed.

The accompanying drawings illustrate an example of the physical embodiment of my invention constructed according to the best of the several modes I have so far devised for the practical application of the principle.

Figure 1 is a sectional view in elevation of an engine-cylinder, steam-chest, and slidevalve, also showing the reversing means. Fig. 2 is a similar view of the steam-chest, valve, and part of the cylinder, the valve being moved to the opposite end of the seat from that shown in Fig. 1. Fig. 3 is a top plan view of the steam-chest with the cover removed. Fig. 4:- illustrates in perspective the steam-passages in the valve and valveseat, the same being represented as abstracted and bounded by lines which indicate the shapes and relative positions of the said passages.

Referring to the several figures, the letter A designates the cylinder, which is of ordinary construction; B, the piston; O, the piston-rod; D, the steam-chest; E, steam-chest cover; F, the slide-valve; G, the guide-strips surrounding the valve-seat; H, the reverscomplete revolution.

of the slide-valve; 4, a passage to one end of the cylinder; 5, a passage to the opposite end of the cylinder; 13, a passage which leads to the atmosphere for the discharge of exhauststeam, and the remaining numerals upon the perspective view shown in Fig. 4 designate parts of the passages through which steam enters and exhausts, as hereinafter set forth.

It will be observed that the rotary plug in the slide-valve has one vertical passage and two horizontal passages and that a steamtight joint is maintained by the nut and washer upon the end of the plug. The slidevalve in moving upon its seat does not dis place the rotary plug, inasmuch as the stem I is slotted and moves over the pin K of the forked operating means.

The modus opera-add is of follows: Live steam enters the steam-chest by the pipe N, passes to the port 1, from 1 to 2, from 2 to 3, from 3 to 4:, where it enters the cylinder and moves the piston, causing the crank-shaft to revolve. end of the cylinder at 5, passes from 6 to 7, from 7 to 8, from 8 to 9, from 9 to 10, from 10 to 11, from 11 to 12, and thence to 13 and exhausts to the atmosphere. The above description has reference to the operation of the piston moving from the end thereof, as

shown in Fig. 1, to the opposite end of the cylinder, the slide-valve occupying the position shown in Fig. 1 and the passages being represented as in Fig. 4. The piston is now at the left end of the cylinder and the valve shifted, as shown in Fig. 2, and is ready to The exhaust-steam leaves the rear.

be moved in the opposite direction, the crankshaft having passed through one-half of a Live steam now enters the port 1, goes from 1 to 2, from 2 to 27., from 27 to 5, and back of the piston. The exhaust-- steam'escapes from passage 4 to 14, from 14 to 15, from 15 to 16, from 16 to 17, from 17 to 18, from 18 to 19, and from 19 to 13, where it escapes to the atmosphere. The crank now has made one complete revolution and the piston made one forward movement and one rearward movement. To reverse the engine and cause it to run in the opposite direction, the plug H, located in the slide-valve, is turned through an arc of ninety degrees, causing the central vertical passage thereof to occupy a horizontal position and also causing the two horizontal passages to take vertical positions, so that steam will be introduced through the end vertical ports at the right and left and below the port designated by the numeral 1. Live steam entering the port 1 passes from 1 to 20, from 20 to 21, from 21 to 27, from 27 to the rear end of the cylinder by way of the passage 5, causing the piston to move from the rear end of the cylinder to the front end. The exhaust-steam enters the passage 4, passes to 14, from 14 to 15, from 15 to 22, from 22 to 23, from 23 to 24, from 24 to 19, and from 19 to 13, where it escapes to the atmosphere. This causes the crank to revolve through an arc of one hundred and ninety degrees. The piston has now moved to the opposite end of the cylinder, while the slide-valve has changed its position, so that it is ready to furnish steam to push the piston to the other end of the cylinder. Steam enters at 1, passes from 1 to 25, from 25 to 26, from 26 to 3, from 3 to 4, where it enters the cylinder and acts upon the piston. The exhaust-steam passes by 5 to 6, from 6 to 7, from 7 to 8, from 8 to 22, from 22 to 23, from 23 to 24, from 2st to 12 and the exhaust-passage 13, which opens to the atmosphere. The slide-valve now has moved from one end of the steam-chest to the other end, so that port 2, which stood over port 3, is now directly over port 27 in position to furnish steam to move the piston in the opposite direction.

I have not shown on the drawings a crank to which the piston-rod is connected, inasmuch as the construction is well known, nor have I shown the slide-valve-operating mechanism, as any well-known type of such mechanism may be used. When a single cylinder is employed, the crank must, of course, occupy a position oft center when the engine is to be started, whereas when two cylinders and pistons are used the cranks and eccentrics are set on the quarter, and consequently there will be no stopping on center, and the crank-shaft may be caused to revolve in either direction at will.

I propose to apply my invention in connection with locomotives, automobiles, steamships, 850., and in such applications use the reversing mechanism disclosed.

From the foregoing description, taken in connection with the drawings,it becomes clear that I have produced an improved reversible engine which fulfils all the conditions set forth as the purpose of myinvention and which obviously possesses many desirable characteristics not appertaining to engines now in use, and the reversing mechanism is extremely simple in construction and easily manipulated.

I have not endeavored by the drawings to show my invention in the form in which itis necessarily to be constructed, but only to illustrate the application of the principle. In its practical physical embodiment there may be innumerable changes and alterations introduced relative to the shape, dimensions, disposition, and arrangements of the parts which are to perform the required functions and without constituting substantial departures.

What I claim as new, and desire to secure by Letters Patent, is

1. A valve mechanism for an engine embracing a cylinder, a valve-seat and a slidevalve; said seat having inlet and exhaust passages, passages to the cylinder, and branch passages; and said slide-valve having nine parallel passages and a stea m-inlet port; the passages in the seat being adapted to simultaneously register with six of the openings in the slide-valve.

2. A valve mechanism havinga seat and a movable valve; said movable valve having a single port 1 at the top open to the steam-chest at all times, and a plurality of passages communicating with said port; and said seat having passages to opposite ends of the cylinder, to the interior of the steam-chest and to an exhaust-opening; the passages in the movable valve being adapted for transferring motive fluid from one to another of the passagesin the seat.

3. A valve mechanism havinga seat and a movable valve; said movable valve having a single port at the top open to the steam-chest at all times and a plurality of passages in communication with the said port; and said seat having passages to opposite ends of the cylinder, to the interior of the steam-chest, and to an exhaust-opening; the passages in the movable valve being adapted for transferring motive fluid from one to another of the passages in the seat; and reversing mechanism in the movable valve having three passages therethrough.

4. A valve having a seat provided with six openings leading to passages communicating with a cylinder, an exhaust-opening, and a source of motive fluid; and a movable valve with separate passages therein for opening communication between the passages in th seat.

5. The combination with an engine-cylinder, of a valve mechanism embracing a valveseat and a slide valve; said seat having steam-passages 8, 27, 15, and 3 communicating with opposite ends of the cylinder, and also passage 13 with branch passages; and said slide-valve having a plurality of passages the openings of which are adapted to register with the openings of the several ICQ the seat; and reversing means in the slidevalve consisting of a rotary plug provided with two parallel passages and a passage at right angles to said two parallel passages. 5 7. The combination with an engine-cylinder, of a valve mechanism embracing a valveseat and a slide-valve having a single port at the top open at all times, and branch passages; said seat having steam-passages communicating with opposite ends of the ey1inder and also an exhaust-passage with branch passages; said slide-valve having a plurality of passages the openings of which are adapted to register with the openings of the several I 5 branch passages in the seat; and said slide- 

